Cementing device for splicing tubes



April-1li,` 1931. c. EMAYAIAIQI'Jr "19800.,462

MENTING DEVICE FOR SPLICING TUBES.

Filed'oct. 29. 192e 2 sheets-sneu 2 INVEN TOR.

A RNEY.

Patenti-ed :Ap-13514, 1931 omnes lor msx nonnen comm d [or maneuvering- .f l This invention relateslto a cementin the ends of rubberles preparatory to sp icing. It has for its ject to p rovide'an apparatus 'of this-character Whlch V -maticallyaI coating z of cement or Ot erv adhesive composition to the'end's ofthe rubber tubes.I It has for its further objeet the elm'nnation of the necessity of applying the ce# Y 1.0 ment by` thev slow and unsatisfactory method .of brushing....v sfhichl is .nowjornmonly used. vIthas foria. 4further object' the vprovision of an apparatus-adaptable for' use in connec-v tion with a conveyor. which" carries the tubes past buing',"cementing,fand drying stat1ons to the lnal'isplicing point. It has or a further object-the provision-fof an apparatus of this character' in which both ends of the tubes can be coated withv cement simultaneously and byasingle Operator. Ithas for a'further object the provisionof anfapparatus which will stretch the rubber at the ends of the tubes while the cement isbein applied.

. In accordance with, these o jects, I have shown in the accompanying drawings a machine capable of cementing the'tubesfautol matically on Vboth ends as the tubes are led pastV it upon a conveyor. Referring particu; larly to the drawings, d

Fig. 1 is a vertical section through one of the eementing devices;

` Fig. 2 is 'a similar view showing the parts V 'cement-spraying devices;

` o and 1n l to splicing;

'in a diii'erent operative position; f

` Fig. 3 is av detail view leftinFig.2;

Fig. 4 is an enlarged detail of one of the f Fig-5 is aI detail,.still further enlarged F partial section, ofthe device shown 1n i .4' v Fig. 6 is a view of a'cenie'nted tube prior Fig. 7 v's a view of the tube after splicing; Fig. Sis atop plan view showing the manf v ner in which two ofthe cementing devicesv are associated with a conveyor; g,

Fig. 9 is a diagrammatic end view of the apparatus shown in Fig. I Fig.' 10 is a top plan etail of the parts as shown in Fig. 2. v l l paratus 4for d;

i 1n various forms, the one illustrated'is composed of two lde'ntlcal machlnes, each comwill apply quickly and substantial] autr' looking from the NORTHAMPTON, MASSACHUSETTS, AyssIeNOn. TO THE camorra FALLs, mssAcnUsETTs, A CORPORATION v'IcE For'. srmonvev Tulanei Although my invention may be embodied pr-lsing an lannular spraying device and' a' centrally disposed head upon which the' end of the tube may be placed, the head being expansible to stretch the tube at its end.; The" spraying device consists of a number of units, annularly arranged, which atomize the ce. ment or other splicing material and throw 1t against the 'end of the tube." The expanding head Sand the spraying .devices areactuated by aA common control-so that, when. the con- .trol' is operated, the tube will be stretched andthe cement appliedin a very' short space of time and without detailed attention on the part of the operator. Each of the splicing devices, of whichtwo are preferably used in connection with asingle tubeconveyor,'i's carried upon a vertical ase o f Vhollow construction. Mounted at the top of the base 10 -is a generally circular casting 11 upon which-the yexpanding and 'channel is a vertically extending flange 14 forming a circular enclosure in' which rods lare mounted (see particularly Fig. 9).

Slidably mounted upon these rodsla're blocks s 16 having surfaces 17 cut on a bevel so that when the blocks are caused to approach one another, as in Figs. 1 and 8,'they Will lie very closely together. The outer periphery 18 of the blocks is formed so that the blocks in their entirety form a circle when in the closed position of Fig. 8. A slot 19, formed in a horizontally extending portion of each block, receives one arm of a bell-crankA 20 pivoted to the block by a pin v21. The beu-Crank' itself is pivoted at 22 to a bracket 23 on the upperv epd of the base 10. Each bell-crank i carries pivoted to its other end a link 24 cone nected to a' cr'os head 25 carried upon a rod 27 and moving verticallyvvithin th'e hollow base 10, ybeing held. in adjustedvfertical, position on the rod by nuts 26. The `lower end of the rod is pivoted at 28 vto a treadle 29 llil pressed into the position of Fig. 2, the crossf head 25 will be drawn downand the bellerank 20 rocked fromy theposition of Fig. 1 to that of Fig. 2. This causes the blocks 16 to slide outwardly upon the rods 15 and to stretch the rubber at the end of the tube a considerable amount. When the treadle is released, the bell-cranks are caused to rock into the position of lF ig. 1 by the action of spring 31, and the blocks are thereby drawn together as in Figs. land 7. The actuation of the treadle 29 likewise serves to operate the sprayingapparatus now to be described.

The spraying of the cement upon the ends of the tube is accomplishedby spray guns of a commercial type illustrated and described in this case conventionally and `.indicated in the drawings by 32. One of the guns is shown in partial section in Figs. 4 and 5 and the piping is shown in Figs. 2 and 3. Each gun -is carried upon a frame 33 bolted at 34 to bracket 35 upon the'circular casting 11. At the inner end of the gun is mounted a nozzle 36 provided with a needle valve 37 extending as a rod through the gun.l

Surrounding the needle valve at 'the inner end of the gun is a passage-way 38 leading into a cement-supplying pipe 39 which in turn is connected with a manifold 40. A

permanent supply of cement or other ad! latter being actuated to release the cementby mechanisms to be described later.

A collar 41 upon the rod of the needle valve is engaged by a linger 42 pivoted to the frame at 43 and formed integrally with other fingers 44 and 45. Sliding in the frame parallel to the needle valve rod 37 is a rod 46 carrying a piston 47 and, engaged bythe fingers 45, moves 'to the right in Figs. v

4 and 5 by the same motion around pivot 43 that causes linger 42 to move the needle valve to the left. Movement of the piston 47 to the right in Fig. 4 and Fig. 5 uncovers a port 48. The movement of the piston to the right is normally lresisted by a spring 49 which also serves to return the piston to the position of Fig. 4 upon the release of the actuating means. To the left. of the piston 47 is a chamber connecting withthe nozzle through a passage-way 5() which diverges when it reaches the nozzle and leads both to an annular opening around the needle vvalve and to small holes 51 pointing in a converging' manne-r' toward the vatomized jet issuing through the hole around the needle valve. The jets of air which come through the holes 51 serve to flatten the stream of atomized.' cement and to give a smooth blend between the several jets issu ed from the several nozzles. The extent of the opening of the needle valve is controlled by an adjustment 52, which is not necessary to be described in detail for the purposes of this case. Air under pressure is supplied to the port 48v through a pipe 53 (Fig. 2) which communicates with a manifold 54' having suitable vconnections whereby aiunder pressure is present at all times'during the operation of the machine.

Likewise mounted upon the frame 33 is a cylinder V55 Ahaving a piston 56 working therein, this piston controlling the operation of those parts of the gun already described. Connected to the piston is a rod 57 which actuates linger 44 as the piston is raised, thereby causing finger 42 to move the needle valve to the left and finger 45 to move the piston to the right.. Air under pressure is supplied to the lo'wer end of the cylinder 55 through a pipe 58 which communicates lwith a manifold 59. A pipe 60 leads from this manifold to a valve 61 mounted Vupon the base 10 and actuated byl alever 62 pivoted to the base at 63. A link`64 connects this lever with the treadle 29 already described, so that when the treadle is depressed, as in Fig.

2, the valve -will be opened and air under pressure admitted to the manifold 59. .By this construction ay single valve 61 controls simultaneously the action of all of the spray guns.

In the preferred arrangement of the spray- 1 ing devices two of them, as shown in Fig. 8,

are mounted side by side on opposite sides' of a slat' conveyor 66. At points adjacent the cementing machine side guides 67 are mounted so as to deflect side portions of the tube a to a point near the ,expanding blocks 16. The operator'is seated 'ear the two machines at a point underneath the slat, conveyor. As the tubes pass he takes an .end of. the tube in each hand and places the respective ends upon the then contracted blocks 16. By stepping upona rail 68, connecting the treadles of the two machines, the blocks 16 of the two machines are simultaneously expanded and, when their motion of expanslon is com- ,plete, the valve 61 operated to admit airto the manifold 59 and cause actuation of all of the spray guns. After a sufficient time has elapsed to thoroughly cement the two ends the bar 68 is released and the tubes allowed to contract, the action of the spray automatically ceasing at the same time.

'The preferred method of splicing isfshown in Figs. 6 and 7 where one end c is culed back upon itself and the other left straight. As the tubes are introduced into the machine the ends will receive a coating of cement shown in Fig. 6 by the stippling. Un-

intentional distribution of the cement upon v other art's of the tube is prevented by annular guldes 69 andO mounted to surround the tube closel when the latter is expanded as applying cementing material to the tube end tube, means for applyingl cementing materialy shown in ig. 2. After thecement has been dried, as by passing through a suitable oven while on the flat conveyor 66 the cuifed portion of the tube is bent bacl: upon the portion b, as shown in Having thus descri my invention, I

v claim:

1. Atube end -cementing apparatus comprising a yplurality Aofy movable blocks resenting in their assembly a generally cy indrical surface adapted to be projected within the end of a tube means for separating the blocks to' stretch the tube end, and means for .and annularly arranged spraying v devices positioned'about each receiving device.

4. tube end cementing a paratus which comprlses a conveyor adapte to support the central portions of a series of tubes with the end portions thereoffree, a pair of tube end receiving and stret'ching devices positioned adjacent the path of movement of the free tube ends, annularly arranged spraying devices positioned ahout each receivin and stretching device, and common means or actuating the several devices simultaneously to stretch the tube ends and spray a coating o f cementing material thereon.

5. A tube end cementing apparatus comprising means for stretching the end of the to the end of the tube w ile so stretched and means to confine the cement application to the stretched portion of the tube.

6. A tube end cementing apparatus comprising means for stretching the end of the t'ube, means for applying cementing material to the end of the tube while so stretched and an annular member positioned concentrically with respect to the tube stretching means and closely surrounding the tube when the latter is in stretched condition to limit the distribution of cement to the stretched portion of the tube.

7. A tube end cementing apparatus comprising means for stretching the rubber adjacent the end of the tube. and means for ,apl plying` cementing material to therubber while so stretched, said stretching means being operable to release the rubber from its stretched condition upon completion of the cementin operation.

,c ARLES EDGAR MAYNARD.

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